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DC fast charging not as damaging to EV batteries as expected

As convenient as DC fast charging is, there have been lots of warnings that repeated dumping of so many electrons into an electric vehicle's battery pack in such a short time would reduce the battery's life. While everyone agrees that DC fast charging does have some effect on battery life, it may not be as bad as previously expected. Over on SimanaitisSays, Dennis Simanaitis, writes about a recent presentation by Matt Shirk of the Idaho National Laboratory (INL) called DC Fast, Wireless, And Conductive Charging Evaluation Projects (PDF) that describes an ongoing test of four 2012 Nissan Leaf EVs that are being charged in two pairs of two. One pair only recharges from 50-kW DC fast chargers, which the other two sip from 3.3-kW Level 2 chargers exclusively. Otherwise, the cars are operated pretty much the same: climate is automatically set to 72 degrees, are driven on public roads around Phoenix, AZ and have the same set of dedicated drivers is rotated through the four cars. "Degradation depends more on the miles traveled than on the nature of recharging." What's most interesting are the charts on page seven of Shirk's presentation (click the image above to enlarge), which show the energy capacity of each of the four vehicles. When they were new, the four batteries were each tested to measure their energy capacity and given a 0 capacity loss baseline. They were then tested at 10,000, 20,000, 30,000 and 40,000 miles, and at each point, the DC-only EVs had roughly the same amount of battery loss as the Level 2 test subjects. The DC cars did lose a bit more at each test, but only around a 25-percent overall loss after 40k, compared to 23 percent for the Level 2 cars. Simanaitis' takeaway is that, "INL data suggest that the amount of degradation depends more on the miles traveled than on the nature of recharging." The tests are part of the INLs' Advanced Vehicle Testing Activity work and a final report is forthcoming. These initial numbers from IPL do mesh with other research into DC fast charging, though. Mitsubishi said daily fast charging wouldn't really hurt the battery in the i-MiEV and MIT tests of a Fisker Karma battery showed just 10-percent loss over 1,500 rapid charge-discharge cycles.

Nissan Leaf resale value expected to take a hit

Nissan Leaf resale values may take a tumble, according to Kelley Blue Book. The vehicle evaluation resource said the 2013 Nissan Leaf will retain around 35 percent of its MSRP after three years; that's down five percent from what KBB gave the 2012 Leaf at the end of 2011. Automotive News reports KBB adjusted the EV's residual value prediction because the used transaction prices for the 2011 model have stuck around 35 percent for the past few months due to relatively cheap gasoline, not to mention the fact that Nissan trimmed the electric's MSRP from $36,050 to $29,650 before the $7,500 tax credit.
Since used buyers are often motivated by more practical buying concerns than early adopters or those wanting to curb their carbon emissions, they may not be willing to pay more for an EV. Meanwhile, early Leaf models are now coming to auction, abandoned by rental car companies after customers shunned them in favor of traditional internal-combustion vehicles. Many of those at auction have less than 10,000 miles and carry an average transaction price of just $13,700.

Nissan recalls 640k crossovers for wiring issue, hood release

The National Highway Traffic Safety Administration has announced two separate recalls affecting hundreds of thousands of Nissan crossovers. The larger of the two involves the electrical system in 2008-2013 model year Rogue CUVs. In affected vehicles, a mixture of moisture and salt seeping in through the carpet on the driver's side could cause the harness connector to short, potentially causing a fire. The issue involves Nissan Rogues manufactured between March 7, 2007, and November 26, 2013, as well as examples of the 2014 Rogue Select manufactured between September 23, 2013, and July 2, 2014. All told, that comes to an estimated 468,815 units in the United States alone. The second recall affects the relatively smaller quantity of 170,665 vehicles, made up of 2013-14 Nissan Pathfinder, 2014 Pathfinder Hybrid, 2013 Infiniti JX35, 2014 QX60 and 2014 QX60 Hybrid models. (The JX35 was recently relabeled as the QX60 under Infiniti's new nomenclature.) The issue affecting some of those vehicles revolves around a hood release cable that may not properly latch. Nissan is notifying owners of the affected units to bring their vehicles in to have the wiring checked and to replace the harness connector and seal in the former case, and to have the hood release mechanism modified in the latter. All told, an estimated 639,480 vehicles are being recalled as part of the two campaigns. RECALL Subject : Electrical Short Due to Water Seepage Report Receipt Date: JAN 26, 2015 NHTSA Campaign Number: 15V032000 Component(s): ELECTRICAL SYSTEM Manufacturer: Nissan North America, Inc. SUMMARY: Nissan North America, Inc. (Nissan) is recalling certain model year 2008-2013 Nissan Rogue vehicles manufactured March 7, 2007, to November 26, 2013, and 2014 Nissan Rogue Select vehicles manufactured September 23, 2013, to July 2, 2014. The affected vehicles may experience an electrical short in the harness connector due to a mixture of snow/water and salt seeping through the carpet on the driver side floor near the harness connector. CONSEQUENCE: An electrical short can cause a vehicle fire. REMEDY: Nissan will notify owners, and dealers will inspect the kick panel wiring harness connector and will if necessary install a new harness connector and waterproof seal, free of charge. The manufacturer has not yet provided a notification schedule. Owners may contact Nissan customer service at 1-800-647-7261.